Abstract
The one-dimensional (1D) linear location technique has been considered as one of the methods for determining the position of acoustic emission (AE) sources in metallic objects. However, this approach does not take into account the heterogeneity of materials and that leads to poor accuracy of AE sources localization. To estimate the positioning error of the linear location technique which is typically used to determine the AE source location a new approach based on the combination of experimental and simulation methods is proposed. This approach for error estimation contains a finite element model construction of the AE signals localization. The model consists of transmitting and receiving transducers mounted on the test object, the frequency response of which selected close to the characteristics of acoustic emission transducers applied in the preliminary experiments. The application of the approach in current research showed that a reduced positioning error on a flat steel plate reaches 15%. The proposed technique can be used to optimize the number of preliminary tests required to calculate the reduced error of the 1D linear location technique applied for the AE sources localization during the inspection of the structure.
Highlights
Acoustic Emission (AE) is one of the most efficient techniques which enables the determination of any faults and structural issues prematurely
The application of the thresholding approach for recording acoustic signals is one of the main reasons for the AE source positioning error growing determined by the 1D linear location method
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Summary
Acoustic Emission (AE) is one of the most efficient techniques which enables the determination of any faults and structural issues prematurely. One of the main tasks of structural AE monitoring is to determine the coordinates (location) of acoustic signal sources, namely defects.
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